Carburetor



J. DALLESINA.

CARBURETOR.

APPLicATloN FILED AUG.7,'1920.

'1. DALLESINA.

CARBURETOR.

APPLICATION FILED AuG.7,192o.

1,432,675., Patented 001;. 17, 1922.

2 SHEETS-SHEET 2.

Patented Got.' l?, i922.

anatre BATNT @FFHQE JOHN DALLESINA, OF LONDON, ENGLAND.

CARBURETOR.

Application led August 7, 1920. Serial No. 401,843.

To all whom z' may concern:

Be it known that I, JOHN'DALLESINA, a subject of the King of England, residing at 213 Queens Road, Bayswater, London, W. Q, England (whose post-office address is 213 Queens Road, Bayswater, London, W. 2, England), have invented certain new and useful Improvements in Carburetors, of which the following is a specification.

This invention relates to carburetors of the non-float type that is to say, the type in which the fuel is fed direct to a needle-valve controlled jet nozzle whence it is drawn, together with air from the air-intake, through the choke tube by the suction of the engine. y

The object of the present invention is to produce a. carburetor of the indicated type in which the fuel and air valves are at all times opened and closed proportionately.

A further object of the invention is to lit the device with means whereby the carbure' tor is applicable to internal combustion engines working with light or heavy fuel.

The invention is illustrated in the accompanying drawings wherein- Fig. l is an elevation,

l" ig. 2 is a central vertical section, and P Fig. 3 is a section taken on the line 3--3 in `ig. l.

Fig. 4 is a sectional view of the three-way valve.

In these drawings A represents the air intake tube, B the fuel suppl pipe, C the choke tube, D the jet nozzle, F the conical needle valve, F the fuel valve operating lever, G the throttle valve, and H the throttle valve operating lever.

The fuel valve lever F is pivoted at F to a frame F2 in which the needle valve E is mounted on a spring E. The end of the lever F is bifurcated and bears upon a nut or block E2 on the spindle of the valve E.

, The air valve lever H is fixed to an elbow piece H rotatably mounted on the throttle valve spindle G and provided with a diametral slot H2 to accommodate a diametraly pin G2 fixed to the valve spindle G with sufficient play between the pin G2 and slot H2 to allow a small initial free movement of the lever H thereby ensuring the closure of the Iiet after the throttle valve has been cornnlctely yshut oii.

The levers F and H are adjustably connected together by means of slide blocks K tixed b set screws or the like K2 to the levers F and and carryinright and left handed screw-threaded rods 3 engaged by a correspondingly internally link K.

The levers F and H are operated by a rod L connected to one of them, in the example shown the rod L is attached to the lever H.

When used with engines working with heavy fuel the fuel supply pipe B is provided with two branches B and B2 and a three-way valve B4 is fitted at their junction with the pipe B. One of the branches, that marked B2 in the drawing, is connected with the heavy fuel supply and the other branch, B', is connected to a source'of light `fuel for starting f the engine. In the -path of the handle B5 of the valve B4 is a projection M secured to the elbow H on the throttle valve lever H so disposed that, when the light fuel screw threaded supply is opened to the needle valve E, it

1s impossible to open the throttle valve beyond a certain predetermined distance thereby ensuring a rich initial mixture at the starting of the engine. When the engine has been running on the petrol for a sutlicient time the valve B4 is operated so as simultaneously to close the petrol branch B and open the heavy fuel branch B2 to the carburetor, thereby removin the handle B5 85 from the path of the pro]ection M' on the throttle valve lever which latter may then be operated to open the throttle to its fullest extent. v

For the` better atomization of the heavier oils, the outlet of the choke tube C is covered with a fine wire gauze net N.

Having fully described my, invention, what I claim and desire to secure by Letters Patent 'is A carburetor for internal combustion engines, comprising a body having an air intake and a jet nozzle, a spring actuated needle valve adapted to normally close said nozzle against the passage of fuel, a lever 100 pivoted to the body adapted to open said needle valve, an inlet valve having an inlet for light fuel and an inlet for heavy fuel, a lever for operating said inlet valve, a throttle valve for controlling the air intake, a 1055 lever for operating said throttle valve and .and

megeve lln testiniony whereof I have hereunto set my hand 1n the presence of two subscribing 10 Witnesses this 22nd clay of July 1920.

JOHN DALLESNA..

Witnesses B. Comi?, N. WMGHT. 

